# Solving Percentage Problems

Warmup

Activity #1

Calculate Percentage Loss when the Cost Price & Selling Price are Given.

The Selling Price is labelled in red while the Cost price is labelled in blue.

• To find the percentage loss when the SP is \$520 and the CP is \$800, pull to the right. The value that is obtained as the loss is the first step in the calculation.
• Now, check the “Calculation” box to see the next step to follow.
• Find the value of d before checking the box to confirm.
• Click to reset.
• To continue practicing, drag the red part. If you make it longer than the blue part, you can calculate percentage gain(profit). The application will be the same.
• You can also change the cost price from 800, by entering a different amount.

Activity #2

Calculate the Selling Price when the Cost price and Percentage Loss are given.

• To find the SP when the CP is \$800 and the percentage loss is 35, again pull to the right (Loss) to see what part of the Tape diagram you are looking for.
• Check the “Calculation” box to see the next step to follow.
• Attempt finding the answer before checking the box to confirm.
• Click to reset.
• To continue practicing, drag the red part. If you make it longer than the blue part, you can calculate Profit. The application will be the same.

Activity #3

Calculate the Cost Price when the Selling Price and Percentage Loss are given.

• Check the “Cost” box.
• To find the SP when the CP is \$520 and the percentage loss is 35, pull to the right (Loss) to see on the Tape diagram the amount representing 35%. Note how it is calculated.
• Check the “Calculation” box to see the next step to follow.​
• Attempt the question before checking the box to confirm your answer.​
• Click to reset.​
• To continue practicing, drag the red part. If you make it longer than the blue part, you can calculate percentage gain(profit). The application will be the same.​

Quiz Time